Just got my 89 S/C back on the road after replacing Clutch, P/Plate Timing belt,water pump,exhaust, and a complete tune up. The only problem is my mileage has now dropped by aprox. a third. This thing got better mileage with the original plug wires and plugs that looked as though they may have been OE also.
I have noticed on start up the engine stumbles a little but the idle picks up almost immediately and idles normally. As usual any help would be greatly appreciated.
